Connection device between toilet and drainpipe

ABSTRACT

This is a type of connection device between toilet and drainpipe, including trap with inlet connected to toilet flush port and outlet connected to drainpipe. The trap has bend part and horizontal lower pipe connected to it. Upper and lower inner pipe walls of the horizontal lower pipe have different declination angles. There is containing part in the inlet; and in the containing part there is sealing part forming sealing structure between the flush port and inlet. This simplifies the complex structure of existing toilet drainage part for on-site installation, for reliable use. Separated trap design features the structure that can generate siphon phenomenon. At the time of sales, wash-down drainage can be easily transformed to siphon wash-down drainage just by changing such parts as the trap of the toilet, thus improving the drainage effect.

TECHNICAL AREA

This connection device between toilet and drainpipe is a utility modelof sanitary ware.

BACKGROUND TECHNOLOGY

The toilet available in the market can be divided into siphon drainagetoilet and wash-down drainage toilet. For siphon drainage toilet, undernormal atmospheric pressure, the water rapidly fills the drainage pipe,forms difference in fluid column height, generates pressure, makes theliquid flow from the high level with high pressure to the low level withlow pressure, generates siphon phenomenon, and drains the ordure out ofthe toilet drainage pipe; and it features water saving, silence andcompletely washed effect. For wash-down drainage toilet, it uses themaximum potential energy of the effective water volume at fastest flowspeed and at maximum flow, to cover the ordure and drain it out; ittends to be eliminated due to high noise, water waste and poor odorsealing function. But for large production volume, there are still somewash-down toilets in the market.

One existing toilet installation method is to mount the drainage port atthe bottom of the toilet on a special flange fixed on the top end of thedrainpipe in the building, and then a sealing method is used to connectthese two parts. For example, China Invention Patent Announcement (No.CN 1085763 C) describes a toilet installation method that uses a flushconnection pipe (6), a drainage connection pipe (7) and a connectionpipe (8) between these two pipes; the length of the connection pipe (8)has to be adjusted by the user on the site, the overall connectionstructure is complex, and it may cause pollution if the pipe is notsealed well.

To sum up, for the connection method of existing toilets hasabove-mentioned defects, wash-down drainage tends to be eliminated, andthere are still many wash-down toilets in the market, it's necessary todesign an easy-to-install connection device that can transform theexisting toilet from wash-down drainage to siphon wash-down drainage.

UTILITY MODEL CONTENT

This utility model is designed to overcome the defects of the existingwash-down toilet such as poor drainage effect and complex connectionwith drainage pipe of the building, and provide an easy-to-installconnection device that can transform the existing toilet from wash-downdrainage to siphon wash-down drainage.

To realize this purpose, this utility model of connection device betweentoilet and drainpipe includes a trap with inlet connected to toiletflush port and outlet connected to drainpipe. The trap has bend part andhorizontal lower pipe connected to it. Upper and lower inner pipe wallsof the horizontal lower pipe have different declination angles. There isradius-increased part at the inlet; in the radius-increased part, thereis sealing part forming sealing structure between the flush port, whichis connected to the radius-increased part with a fixing part

Compared to existing technologies, this utility model simplifies thecomplex structure of existing toilet drainage part for on-siteinstallation, for easy and reliable use; the separated trap designfeatures structure that can generate siphon phenomenon. At the time ofsales, wash-down drainage can be easily transformed to siphon wash-downdrainage just by changing such parts as the trap of the toilet on therequest of the user, thus improving the drainage effect.

This utility model is further described with the following drawings andexamples.

DESCRIPTION OF DRAWINGS

Drawing 1 is vertical cross section drawing of the toilet using thisutility model of connection device;

Drawing 2 is explosion drawing of floor flange and this utility model ofconnection device between toilet and drainpipe;

Drawing 3 is the assembly drawing of this utility model of connectiondevice between toilet and drainpipe;

Drawing 4 is the sectional view of this utility model of connectiondevice between toilet and drainpipe trap;

Drawing 5 is the section drawing of A-A line in Drawing 4.

IMPLEMENTATION METHOD

Drawing 1 is the vertical cross section drawing of an optimalimplementation example, toilet 1, using this utility model of connectiondevice 2 between toilet and drainpipe. Especially, besides theconnection device 2, toilet 1 can be of any suitable type, such aswash-down drainage toilet 1, which includes a bowl 11 and a tank 12 overthe back of bowl 11. The tank 12 is filled with clear water to flushbowl 11. An curve channel 13 is formed below the below bowl 11, with theshape similar to upside-down “U”. There is a backward flush port 16 atthe end of the curve channel 13. The clear water in tank 12 flowsthrough a waterway 14 to the bowl 11. A supporting part 15 is formed atthe bottom of bowl 11.

The existing floor flange 4 for connecting the toilet I is stillremained at the top end of drainpipe 3, and the floor flange 4 ispre-installed during the building construction. For existing floorflange 4, this utility model of connection device 2 between toilet anddrainpipe can also be used.

Drawing 2 and Drawing 3 are explosion drawing and assembly drawing ofthis utility model of connection device 2 between toilet and drainpiperespectively. This utility model of connection device 2 between toiletand drainpipe includes trap 20, washer 21, sealing ring 22, washer cover23 and sealing ring cover 24.

The trap 20 is in curve shape, with an inlet 201 and an outlet 202. Theintegrated flange containing cavity 203 is connected to the end of theinlet 201; the washer 21 is inside the flange containing cavity 203; thesealing ring 22 is fitted to the part of drainpipe 3 standing out of thefloor flange 4; the sealing ring cover 24 is fitted to and fixes thesealing ring 22; and, sealing ring cover 24 and sealing ring 22 arefitted tightly.

See Drawing 1 and Drawing 5. At the time of installation, inlet 201 isconnected to flush port 16 of toilet 1; washer cover 23 covers washer 21and is between the flange containing cavity 203 and toilet 1; flush port16 is connected to inlet 201 of trap 20 through washer cover 23, washer21 and flange containing cavity 203; bolt 5 connects trap 20, washer 21and washer cover 23 through flange containing cavity 203 and screw holes204 and 231 around washer cover 23. Washer 21 is made of elasticmaterial, with inner diameter slightly smaller than or basically equalto outer diameter of flush port 16, thus washer 21 is fitted tightlywith outer pipe wall of flush port 16 and seals the connection positionbetween trap 20 and flush port 16. In addition, with bolt 5, the washercover 23 is pressed on washer 21 to make the sealing effect morereliable.

Sealing ring 22, also made of elastic material, is fitted tightly withfloor flange 4 connected to drainpipe 3, and is fitted to outside ofsealing ring 22 with sealing ring cover 24, further ensuring thereliability of connection and sealing. The inner diameter of sealingring 22 is slightly smaller than or basically equal to outer diameter ofoutlet 202. At the time of installation, outlet 202 is connected todrainpipe 3 just by connecting trap 20 to toilet 1 and inserting one endof outlet 202 directly to drainpipe 3 through sealing ring cover 24,sealing ring 22 and floor flange 4. The sealing ring 22 is fittedtightly to outer pipe wall of outlet 202. The sealing ring cover 24 isfitted to make the sealing effect more reliable.

See Drawing 3 and Drawing 5. After installation, trap 20 bends andextends from the flush port 16 of toilet 1. The trap 20 basically haseven ring section along its length, and this section occurs at least atthe outlet 202 close to trap 20 (see the A-A section line in Drawing 4).The lower pipe wall of inlet 201 of trap 20 extends backwards from flushport 16 of toilet I horizontally for a distance “L” (20˜45 mmoptimally), and its upper pipe wall has a declining structure whichextends backwards to the first bend 205. The optimal radius R of thefirst bend 205 is 45˜65 mm. Lower pipe part 206 extends straightly fromthe first bend 205 to the second bend 207. The second bend 207 points tooutlet 202 and bends by 90 degrees downwards. Optimally, upper innerpipe wall 208 and lower inner pipe wall 209 of lower pipe part 206 havedeclination angle “α” of 2˜7 degrees and declination angle “β” of 0˜5degrees respectively to eliminate or reduce the generation of cavitation(without drawing) that may influence siphon effect of trap 20, so thatthe water from toilet 1 can fill up the entire trap 20 rapidly. Thebasically even ring section of trap 20 helps to realize this effect. Theoptimal section inner diameter D is between 52˜56 mm.

As mentioned above, this utility model of connection device 2 betweentoilet and drainpipe simplifies the complex structure of existing toilet1 for on-site installation, for reliable use; the separated trap 20design features structure that can generate siphon phenomenon. At thetime of sales, wash-down drainage can be easily transformed to siphonwash-down drainage just by changing such parts as the trap of thetoilet, thus improving the drainage effect. This utility model ofconnection device 2 between toilet and drainpipe can also be applied tosiphon toilet.

1. A connecting apparatus for making a connection between a flushingport and a drainpipe, said connecting apparatus comprising a trap-waypiece which has an entrance in fluid communication with said flushingport of a toilet stool and an exit in fluid communication with saiddrainpipe: wherein said trap-way piece having a curvy pipe portion and atransverse low pipe portion connected with it, and wherein the lower andupper part of inner wall of said transverse low pipe portion extendingwith a different down angle, and wherein said entrance comprising anradius enlarging portion connected and held together with said flushingport by a sealing material and skewed by a fixing component.
 2. Theconnecting apparatus according to claim 1, wherein said trap-way piecehas a symmetrical ring-shaped cross-section approximately.
 3. Theconnecting apparatus according to claim 2, wherein the radius range ofsaid ring-shaped cross-section is between 52˜56 mm.
 4. The connectingapparatus according to claim 1, wherein the radius range of said curvypipe portion is between 45˜65 mm.
 5. The connecting apparatus accordingto claim 1, wherein the upper part of said inner wall incline about 2-7degrees.
 6. The connecting apparatus according to claim 1, wherein thelower part of said inner wall incline about 0-5 degrees.
 7. Theconnecting apparatus according to claim 1, wherein said radius enlargingportion and fixing component are shaped about flange.
 8. The connectingapparatus according to claim 1, wherein it further comprises a sealingmember between said drainpipe and exit.
 9. The connecting apparatusaccording to claim 8, wherein said sealing member comprises a obturatingring and a jacket.
 10. The connecting apparatus according to claim 8 or9, wherein said sealing member comprises elastic material.